If you fall into a real astronomical black hole (choosing a supermassive black hole, to make
sure that the tidal forces do not get you first), then you will probably meet your fate not at a …

On the basis of the Kerr metric as a model for a spinning black hole accreting test particles
from rest at infinity, I show that the center-of-mass energy for a pair of colliding particles is …

We investigate the problem of the dynamical collapse of a self-gravitating complex charged
scalar field in Einstein-Maxwell-dilaton theory with a phantom coupling for the adequate …

We study the possibility of obtaining unbound energy E cm in the center-of-mass frame
when two particles collide near the inner black hole horizon. We consider two different cases …

We elaborated the gravitational collapse of a self-gravitating complex charged scalar field in
the context of the low-energy limit of the string theory, the so-called dilaton gravity. We begin …

Callan, Giddings, Harvey, and Strominger (CGHS) previously introduced a two-dimensional
semiclassical model of gravity coupled to a dilaton and to matter fields. Their model yields a …

We studied the influence of dilaton field on the dynamical collapse of a charged scalar one.
Different values of the initial amplitude of dilaton field as well as the altered values of the …

We study a simple system of two hyperbolic semilinear equations inspired by the Einstein
equations. The system, which was introduced by Ori and Gorbonos [J. Math. Phys., 48 …

We consider generic nonextremal stationary dirty black holes. It is shown that in the vicinity
of any bifurcation surface the energy of collision of two particles in the center of mass frame …

A class of semi-linear hyperbolic systems in 1+ 1 dimensions was investigated several years
ago by Ori and Gorbonos. This class, to which we shall refer as" flux-conserving systems" …